OCP CBT Question 671

Examine the following statements about Oracle background processes: 1. The `SMON` process performs instance recovery at instance startup, if necessary. 2. The `DBWn` process writes dirty buffers from the database buffer cache to data files. 3. The `PMON` process performs process cleanup when a user process fails. 4. The `LGWR` process writes redo log buffer entries to redo log files. Which two statements are true about the `SMON` and `DBWn` background processes?